* {
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
}

html,
body,
#app {
    width: 100%;
    height: 100%;
}

#app {
    display: flex;
    flex-direction: column;
}

header {
    width: 100%;
    height: 50px;
    display: flex;
    background: pink;
    justify-content: space-around;
    align-self: center;

}

main {
    width: 100%;
    flex: 1;

    #box {
        width: 100%;
        height: 300px;
        display: flex;
        flex-wrap: wrap;

        li {
            width: 30%;
        }
    }
    .swiper {
        width: 100%;
        height: 300px;
    }  
}

img {
    width: 60px;
    height: 30px;

}